List books published by Addison-Wesley after 1991, including their year and title.

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Create a flat list of all the title-author pairs, with each pair enclosed in a "result" element.

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For each book in the bibliography, list the title and authors, grouped inside a "result" element.

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For each author in the bibliography, list the author's name and the titles of all books by that author, grouped inside a "result" element.

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The order in which values are returned by distinct-values() is undefined. The distinct-values() function returns atomic values, extracting the names from the elements.

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For each book found at both bstore1.example.com and bstore2.example.com, list the title of the book and its price from each source.

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For each book that has at least one author, list the title and first two authors, and an empty "et-al" element if the book has additional authors.

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List the titles and years of all books published by Addison-Wesley after 1991, in alphabetic order.

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Find books in which the name of some element ends with the string "or" and the same element contains the string "Suciu" somewhere in its content. For each such book, return the title and the qualifying element.

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In the above solution, string(), local-name() and ends-with() are functions defined in the Functions and Operators document.

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In the document "books.xml", find all section or chapter titles that contain the word "XML", regardless of the level of nesting.

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In the document "prices.xml", find the minimum price for each book, in the form of a "minprice" element with the book title as its title attribute.

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For each book with an author, return the book with its title and authors. For each book with an editor, return a reference with the book title and the editor's affiliation.

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Find pairs of books that have different titles but the same set of authors (possibly in a different order).

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The above solution uses a function, deep-equal(), which compares sequences. Two sequences are equal if all items in corresponding positions in the two sequences are equal - if the sequences are node sequences, the values of the nodes are used for comparison.

Prepare a (nested) table of contents for Book1, listing all the sections and their titles. Preserve the original attributes of each <section> element, if any.

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Prepare a (flat) figure list for Book1, listing all the figures and their titles. Preserve the original attributes of each <figure> element, if any.

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How many sections are in Book1, and how many figures?

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How many top-level sections are in Book1?

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Make a flat list of the section elements in Book1. In place of its original attributes, each section element should have two attributes, containing the title of the section and the number of figures immediately contained in the section.

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Make a nested list of the section elements in Book1, preserving their original attributes and hierarchy. Inside each section element, include the title of the section and an element that includes the number of figures immediately contained in the section.

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In the Procedure section of Report1, what Instruments were used in the second Incision?

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In the Procedure section of Report1, what are the first two Instruments to be used?

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In Report1, what Instruments were used in the first two Actions after the second Incision?

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In Report1, find "Procedure" sections where no Anesthesia element occurs before the first Incision

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(No sections satisfy Q4, thankfully.)

In Report1, what happened between the first Incision and the second Incision?

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Here is another solution that is perhaps more efficient and less readable:

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In the above output, the contents of the critical sequence element include a text node, an action element, and the text node containing the content of the action element. But the serialization we are using already shows all descendants of a given node. If $c is bound to a sequence of nodes, the following expression eliminates members of the sequence that are descendants of another node already found in the sequence:

In the following solution, the between() function takes a sequence of nodes, a starting node, and an ending node, and returns the nodes between them:

Here is the output from the above query:

List the item number and description of all bicycles that currently have an auction in progress, ordered by item number.

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The above query returns an element named item_tuple, but its definition does not match the definition of item_tuple in the DTD.

For all bicycles, list the item number, description, and highest bid (if any), ordered by item number.

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Find cases where a user with a rating worse (alphabetically, greater) than "C" is offering an item with a reserve price of more than 1000.

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List item numbers and descriptions of items that have no bids.

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For bicycle(s) offered by Tom Jones that have received a bid, list the item number, description, highest bid, and name of the highest bidder, ordered by item number.

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The above query does several joins, and requires the results in a particular order. If there were no order by clause, results would be reported in document order. If you do not care about the order, you can use the unordered function to inform the query processor that the order of the lists in the for clause is not significant, which means that the tuples can be generated in any order. This can enable better optimization.

Unordered Solution in XQuery:

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For each item whose highest bid is more than twice its reserve price, list the item number, description, reserve price, and highest bid.

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Find the highest bid ever made for a bicycle or tricycle.

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How many items were actioned (auction ended) in March 1999?

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List the number of items auctioned each month in 1999 for which data is available, ordered by month.

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For each item that has received a bid, list the item number, the highest bid, and the name of the highest bidder, ordered by item number.

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List the item number and description of the item(s) that received the highest bid ever recorded, and the amount of that bid.

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List the item number and description of the item(s) that received the largest number of bids, and the number of bids it (or they) received.

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For each user who has placed a bid, give the userid, name, number of bids, and average bid, in order by userid.

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List item numbers and average bids for items that have received three or more bids, in descending order by average bid.

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List names of users who have placed multiple bids of at least $100 each.

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List all registered users in order by userid; for each user, include the userid, name, and an indication of whether the user is active (has at least one bid on record) or inactive (has no bid on record).

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List the names of users, if any, who have bid on every item.

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(No users satisfy Q17.)

List all users in alphabetic order by name. For each user, include descriptions of all the items (if any) that were bid on by that user, in alphabetic order.

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Locate all paragraphs in the report (all "para" elements occurring anywhere within the "report" element).

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Elements whose start-tags are on lines 6, 11, 20, 27, 34, 39, 46, 53, 56, 62, 67, 71, 76, 83, 90, 94

Locate all paragraph elements in an introduction (all "para" elements directly contained within an "intro" element).

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Elements whose start-tags are on lines 6, 11, 20, 27, 53, 56, 62, 90, 94

Locate all paragraphs in the introduction of a section that is in a chapter that has no introduction (all "para" elements directly contained within an "intro" element directly contained in a "section" element directly contained in a "chapter" element. The "chapter" element must not directly contain an